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J. C. THAPP.

VALVE GRINDING TOOL.

APPLICATUN FILED SEPT. H. 1918. 1,315,801 Patentedsept. 9, 1919.

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J. C. TRAPP.

VALVE GRINDING TOOL.

APPLICATION FILED SEPT, II. 19I8.

1 ,3 1 5,801 Patented Sept. 9, 1919.

2 SHEETS-SHEET 2.

' JOHN 0. MP, or INDIANAPOLIS, immune;

VALVE-GRINDING TOOL.

Specification of Letters Patent.

Patented Sept. 9, 1919.

Application filed September 11, 1918. Serial No. 253,507.

To all whom 'it may concern:

Be it known that I, JoHN C. TRArP, a citizen of the United States of America, residing at Indianapolis, Marion county, Ind, have invented new anduseful Valve-Grinding Tools, of which the following is a specification, 1 i

This invention relates to a power applying tool, especially for multiple adaptation.

This invention has utility when incorporated in a drive for grinding simultaneously a plurality Ofl puppet valves into their rc-' spective seats.

Referring to the. drawings:

Figure 1 is a fragmentary plan view of a Ford four cylinder internal combustion motor, with. the cylinder" head member removed and the grinder of'this invention in position;

Fig. 2 is a viewon an enlarged scale'of the grinder tool in horizontal section just be low the upper movable frame; I

Fig. 3 is a bottom plan view of one of the valve engaging heads; Fig. 4 is a fragmentary side elevation ofthe tool i Fig. 5 is a front elevation of the too], the handles being broken away; g

. Fig. 6 is a detail of the mountingof a valve engaging head; and

Fig.7 is a bottom plan view of a head oscillating crank.

The motor block l-hav'ing the cylinders 2 has the head member removably mounted thereon by bolts engaging in the holes 3, the showing being of the Ford Motor Co., Detroit, Mich, motor as used in Model T automobile. However, in puppet valve types of multiple cylinder internal combustion motors th general principle prevails, and only the slight proportioning of parts may usually be all that is necessary in adapting the device herein to thenumber of valves desired to be handled simultaneously and their grouping. 1

Without the necessity of special machining, one of the bolts 4 mounting the cylinder head member in position on the block 1, may be remounted in position In the arm 5 for rigidly mounting afirst frame having upright arm 6 in fixed position as to valve seats 7 in the member 1, forvalves 8, having the diametrically spaced openings 9- in the top thereof.

These arms 5, 6, provide the first or main frame of the tool or grinder drive device.

- mounted on the rod 17 by pin 26. 1

The member 23 of the third frame has guide openings 27 for tubular stems or sleeves The arm 6 carries at its upper extremity a pivot pin 10 as a fulcrum bearing for a pressure applying lever 11 of the second class. I

Thisv lever 11, remote from the fulcrum beariug 10 has a handle 12. Intermediate the member 18 and a main member 19 fast there 4 hold the rod 17 from longitudinal movement with, and these members of the second frame 7 relatively thereto by pins 20, "21. The rod'k 17 extends beyond this second, frame and through the pair of parallel members 22, 23, 7 held spaced from each other by the sleeves held.

24; about bolts 25. I This third frame is 28'. The sleeves 28" are provided with dia; metrical notches 29 upward from the lower end. Pivot pins 30i'hold for rockingin thef notches 29 bars 31 provided'with a pair of projections 32 for entering the openings or recesses 9 of the valve 8. These valve engaging heads mounted in the member 2.

have centrally therein rods 33 provided with cross pins 34 ccacting with the slots 29 above open radial notches 35 are mounted n threaded portions'36 of the rods 33 on the side of the member 22 away from the member 23, the rods 33 extending through openings 37 in the member 23 to alinewith the openings 2-7 in the member 23. The rods 33 fixed against longitudinal movement as to the member 22 by washers 38 and keys 391m the side of the member 22 toward the member 23. Between the washers 38 and the sleeves 28 are disposed helical springs 40, normally independently yieldably urging each valve engaging head away from the member 22, or axlally downward to the limit as fixed by the pins 34.

The lever .11 may be considered as a link swingably carrying the second and third frames as to the first or rigid main mounting frame. a

The rods 33extend upward through openings 11 in. the member 19 of the second frame, thus maintaining the frames 18, 19,

and 22, 23, in a common plane. About the rods 33 are loosely mounted the driving the n1'embei's'31. Nuts 3.4 having upwardly for engaging the notches 35 in the nuts 34v when moved into vicinity for such engagement by pressure on the handle 12 to over.- come the action of spring 47 about the rod 17, which normally acts to maintain the second and third frames spaced from eac.h

other as limited'by the pin 26.. This pres sure on the handle 12 for effectin driving engagement of the cranks 42 with the valve engaging heads also has the pressure of such applied power transmitted to hold the valves 8 against their seats 7 dur the grinding operation.

in %he actuator effecting the oscillatory drive of the heads, is sh wn as having'source in the reciprocable han le 48 having detachable universal joint connection 49 with angle lever 50 mounted by fulcrum pin 51 on the second frame. Short arm 51 of this angle lever 50, has a link 52 as a power transmitting means extending to link 53 connected to the plurality of cranks for 'drlving the several valve engaging heads.

In operation, after the cylinder head member is removed and a bolt 4 is taken to mount the first frame 5, 6 rigidly in position, the projection 32 of the several heads are properly engaged in the respective valves 8. The heads are readily locked in this valve engaging position, by moving the upper end of lever 54 outward away from the swingable frames, thus thrusting the bar 55 as guided by arm 6, through bracket 56, so that forked end 57 of the bar 55 engages the rod 17 just below the member 22, and as thus positioned may be a positive stop for taking the valve'spring pressure for holding the valve and tool-in position, while said springs 40 provide the pressure for the respective valves in grinding. Spring dog 58 holds the bar 55 in thrown or retracted position.

Oscillating or rather reciprocating of handle 48, with sulficient pressure applied to handle 12 to bringthe projections 46 of the cranks 42 into the notches 35, effects a simultaneous back and forth turning of the several valves in the group of the tool engagement. After several such reciprocations of the handle 48, near the end of a stroke, the handle 12 may have the pressure mote point by there applying pressure to the handle 12, will shift the grinding region of each of the several valves in their oscillation. This ste pin about of the valves by withdrawing the. bar 55, and with these \second and third frames then swung free of the valves by the handle 12, full access to each of the valves 8 may now be had. The

length of the stroke given the handle 48 may be such as is convenient forthe operator, while the adjustingiscrew .16 permits such placing of the lever 11 as brings the handle 12 in a desired osition for the holding of the clutch or rivingv connection in en agement. v

n the idle movement of the handle 48 when shifting the connection of the drive or actuator to the several valve engaging heads, it is desirable that such heads not shift. Accordingly there is disposed pairs of levers 59 fulcrumed on the member 22 of the third frame and actuable in pairs by intermediate springs 60 as frictional retarding means against the nuts 34.

What is claimed and it is desired to secure by Letters Patentis: 11

1-. A multiple drive device comprising engaging heads, a manually shiftable pressure apply nglever, yieldable means for transmitting lever thrust to the heads, and a reciprocable actuator for the heads.

2. A multiple drive device comprising engaging heads, a pressure applying member effective for a plurality of heads, yieldable means for transmitting member thrust to the heads, a reciprocable actuator for the heads, and connecting means between the. actuator and clutch heads permitting angular shifting of the actuator as to the several heads simultaneously to vary reciprocation of the heads.

3. A multiple drive device comprising engaging heads, a pressure applying member,

efi'ectlve for a plurality of heads, yieldable means for transmitting member thrust to the heads, a reciprocable actuator for the heads, and means for releasing the heads from the actuator. I

4. A valve grinder tool comprising an en: gaging 1 head, a rigid frame, a swingable frame connected to the rigid frame and carrying the head, means for locking the swing-, able frame against swinging when the head is in operative position, an actuator, and a pressure applying member for the head opgralle to clutch the actuator to drive the the region of 5. A valve rinder tool comprising a frame mountab e rigidly with a valve housing, a link extending from said frame, a frame swingably carried by the link, valve engaging heads mounted in the swingable frame, a reciprocable actuator for the heads, and a pressure applying member for the heads operable to clutch the actuator to drive the heads.

6. A valve grinder tool comprising a frame mountable rigidly with a valve housing, a link extending from said frame, a frame swingably carried by the link, independently yieldable valve engaging heads mounted in the swingable frame, a reciproca'ble actuator for the heads, and a pressure applying member for the heads operable to clutch the actuator to drivethe heads.

7. A valve grinder tool comprising a plurality of valve engaging heads, and a common drive for said heads including a reciprocable actuator and a pressure applying lever for simultaneously clutching the actuator to. the several heads.

8. A valve grinder tool comprising a frame mountable rigidly with a valve housing, a link extending from said frame, a frame swingably carried by the link, valve engaging heads mounted in the swingable frame, a reciprocable actuator for the heads, connecting means between the actuator and heads permitting angular relative shifting thereof, and a pressure applying member for the heads operable to clutch the actuator to drive the heads.

9. Mechanism for grinding a valve into its seat comprising a frame mountable rig idly with the valve seat, a link extending from said frame and provided with a pressure applying handle, a second frame corinected to the link, a valve engaging head mounted in the second frame to have pressure from the handle applied thereto, and

driving means for the head for turning the head as to the seat.

.10. Mechanism for simultaneously grinding a plurality of valves into their respective seats comprisin a fulcrum frame mountable rigidly witi i the valve seats, a lever extending from said fulcrum frame, a second frame to which pressure is applied by said 1 lever, valve engaging heads carried by the second frame to be maintained by said pressure applying lever in operative engagement with the valves, and driving means independently of said'lever for giving the heads an oscillatory movement.

11. Mechanism for simultaneously grinding a plurality of valves into their seats comprising a frame mountable rigidly with the valve seats, a lever fulcrumed on said frame and extending to provide a pressure applying handle, a second frame connected to the lever to have pressure applied thereto by said handle, valve engaging heads carried by the mcond frame, means for holding the second frame in position to maintain the heads in operative position as to the valves, and driving means for giving simultaneous oscillatory movement to the heads.

12. A valve grinder tool comprising a rigidly mountable frame, a pressure applying lever extending therefrom, a pressure transmitting frame pivotally connected to the lever, a third frame yieldably connected to'the second frame, valve engaging heads independently yieldably mounted in the third frame, an oscillatory driving crank mounted on the second frame and having drive transmitting means extendin therefrom, and lever pressure controlle engaging means for connectin the transmitting means to actuate the hea s.

In witness whereof I affix my signature.

- JOHN C. TRAPP. 

